Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ff2b2e4bfbeaac…

MALICIOUS

PDF

73.3 KB Created: 2021-04-25 15:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b2fc05e967c4efb6406f7b3d2a1d0a2c SHA-1: da05587236ffdbadb73c9a16e5a11f239741e33c SHA-256: c4ff2b2e4bfbeaac2983ef9fa9ff63e6bc4b0f54a893f3c3588200e490e56973
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/strik?utm_term=what+does+the+preamble+mean+to+america+today PDF link annotation
    • http://pihodze.com/capriol_suite_pavane_sheet_music4q11l.pdfIn PDF document text
    • http://copyright-supporthelp.com/sugidawexenutufanuzzobw4.pdfIn PDF document text
    • http://topcreditcheck.info/what_is_the_purpose_of_injury_lawyeru209u.pdfIn PDF document text
    • http://zyzycheat8.xyz/technical_project_manager_jobs_seattleo29w8.pdfIn PDF document text
    • http://itawegan.space/rounding_decimals_to_the_nearest_10_worksheet6ahnh.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/415798.pdfIn PDF document text
    • http://wisecreditscore.info/ethiopian_grade_11_maths_textbookkfkae.pdfIn PDF document text
    • http://sberbank.services/piggy_book_2_release_date_timen7sj3.pdfIn PDF document text
    • https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/9984017.pdfIn PDF document text
    • http://megahit.space/73769883273rfxr7.pdfIn PDF document text
    • https://kitivagep.weebly.com/uploads/1/3/0/7/130775950/8937137.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gopuze/tirinun.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/spotify_premium_terbaru_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/luvowezatupa.pdfIn PDF document text
    • http://vibiwesipo.rf.gd/96433240138.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/design_doll_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/66787925504.pdfIn PDF document text
    • http://vibosaxijus.rf.gd/ripekijegedisiginavol.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/jozibixajofoti.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/pifam.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/35717937446.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DA 5568 bytes
SHA-256: 3a7fdab232d234f62a2d8d0e2aa3a2841acf772928395246612c41d30283edbf
font_01_sfnt_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 10172 bytes
SHA-256: 5dd2dc3b73b774c0ff347288e3b0ee9701d4e8ec68779f0186065a766b19f353

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